JPS6030389B2 - Expander for tubular fabric - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The invention comprises a central carrier carrying a radially swingable bearing and a segmented guide element pressed by said bearing, for use in externally held tubular fabrics. It concerns a cylindrical expander.

Expanders of various embodiments are known.

One of its essential features is that it includes a guide element which can be expanded from the outside and which comes into contact with the cylindrical fabric from the inside to expand and tension it. A pressure roll is disposed from the outside into the recess of the expander, thereby holding the expander in a floating manner. -The expander is configured in a fan-flat shape.

For example, the cylindrical mesh fabric janitorial/fixing device described in DE-OSI 635281 includes one floating expander, which consists of two sliding twills and a tube on top of these sliding twills. The shaped dough is stretched. Each of these sliding bars has a recess that accommodates two elongated rolls, and from the outside, a stopper roll is placed between these two rolls, which allows the expander to float. Hold. When transporting the fabric, it is necessary to overcome the slight SI friction between the sliding twill and the fabric. In this case, the cylindrical fabric is held fan-flat with a thickness that corresponds to the thickness of the slide. For example, DE-OSI team 9
In the other known planar expander described in Part 3,
Instead of a sliding rod, two parallel carriers are provided, which can be covered by a parallel control rod. In this case, the fabric is not stretched on the slide or the carrier itself, but on rotating rolls that are arranged separately on the carrier to reduce friction. An endlessly circulating compare belt can be provided on these roll rows. This expander is also held in a floating manner via external support rolls. All these Kohei type expanders exhibit drawbacks when the tubular fabric is liquid processed, ie, mercerized.

That is, the elongated slide or roll and the support roll supported externally against it leave streak-like marks behind them due to the required pressure of these members on the wet fabric;
This seriously disturbs the appearance of the fabric. Expanders are also known that do not tension and maintain a flat surface only in a single plane, but act on a plurality of tension planes, that is, expand in space.

For example, DE-AS1277189 and DE-06146
0592, an endless tension belt is provided on the annularly arranged deflection rolls, and this tension belt runs along with the tubular fabric in the longitudinal direction of the device, and at the same time acts against the tubular fabric from the inside. It is crimped. In this case too, bearing rolls are provided outside the fabric, which bearing rolls produce the same undesirable effects as described above. Another prior art expander is described in DE-PS 466211.

This is a tubular fabric drying rack, in which several telescopic rings are divided into segments, which are attached to an expandable ring via coil springs arranged above them. Each segment is radially adjustable via scissor-like adjustment arms. A plurality of such expandable rings, each with an adjustment arm, are arranged on the central spindle via movable sockets and constitute a drying platform adaptable to the diameter of the tubular fabric. In this frame, the fabric to be dried is stretched through each ring-shaped coil spring,
In the middle of each ring, a connecting twill is provided in the mari direction. However, these connecting rods serve only for reinforcement and not for guiding the fabric. However, this type of expander is unsuitable for the continuous conveyance of tubular fabrics, especially if the tubular fabrics are to be treated with liquid, and cannot be held in a floating position from the outside. Starting from the last-mentioned type of expander, the guidance of the tubular fabric on the expander, in particular the spreading process of the fabric in its introduction section, is improved, with the aid of conveyor rolls that keep the expander in its floating state. It was an object of the present invention to take measures to avoid high surface pressure.

According to the present invention, longitudinally tapered bodies are arranged at both ends of the central carrier as an inlet part and an outlet part, and conveyor rolls are attached to these tapered bodies from the outside. This problem is solved by the guiding element extending in the longitudinal direction of the expander in the middle of the tapered body and by the conveying roll exhibiting a contour adapted to the shape of the tapered body.

Due to the special structure of the conveying roll, high surface pressures and streak marks caused by conventional narrow backing rolls are avoided. This advantage is particularly evident when the fabric is in a wet state after liquid treatment. Preferably, the guide element is constructed as a backing of a cylindrical casing and the tapered body is constructed as a truncated cone.

For the treatment of tubular fabrics, it is desirable that at least a portion of the expander be immersed in the treatment liquid so that the immersed truncated cone is floating. For fabric treatment with liquids, it is desirable to provide the guide element, at least in that part of its surface exposed to liquid treatment, with a corrugated outer surface structure running at right angles to the direction of fabric transport.

This corrugated external structure on the surface of the guiding element is necessary in the conveying rolls, since it allows the treatment soot to fully act on the tubular fabric from both sides and also facilitates the conveyance of the fabric along the expander. The adhesion force applied is less, which also reduces the amount of marks left on the fabric. A further improvement is brought about by the cooperation of this corrugated structure and the nozzle for the treatment medium which is arranged in an annular manner surrounding the expander from the outside. This effect is particularly effective when the mist direction of these nozzles is directed towards the valleys of the corrugated foundation. The expander according to the invention may be present in one or more expanders in the processing device.
It can be installed. The expander of the present invention is also suitable for various fluid treatments. For example, mercerization,
It is also suitable for leaching treatment, washing or exudate removal. Dyeing is also possible. Finally, a nozzle ring can be arranged, for example in the outlet of an expander in a washing machine, which carries out the drying by blowing out or sucking air instead of the treatment liquid. Further, the expander of the present invention can be attached for the purpose of observing or inspecting a tubular fabric. In this case, for example, optical scanning is performed on the defect source, light is projected onto the fabric from the outside, and a light-sensitive scanning calendar is placed inside the fabric, and this scanning device is able to detect variations in the amount of light transmitted. It is made to sense and send out a defect signal. In that case, a photosensitive element could be inserted into the surface of the guide element. Hereinafter, the present invention will be described in detail with reference to embodiments shown in the drawings.

FIG. 1 shows a plan view of the structure and application example of an expander according to the present invention.

This figure is purely illustrative. This is because one expander or a plurality of expanders are used in accordance with the operating method of each expander. In this case, two expanders BI and B2 are arranged in one processing device. These two expanders are housed in one container 1. The running path of the fabric to be treated is indicated by a chain line and is provided with an arrow. The product first passes over the driven introduction roll 8 and then over the expander B
1 from top to bottom until the pair of idling lead-out rolls 9 is reached. The product is then guided towards a pair of idling introduction rolls 8 of the expander B2 and from there it travels upwards over the expander B2 to a pair of idling output rolls 9. The structures of these expanders BI and B2 will be briefly explained below.

Each expander comprises a frusto-conical lead-in member 3 and a similarly shaped lead-out member 4. The carrier elements connecting these inlet and outlet elements are not shown in any case. This carrier member will be described below in connection with FIGS. 2-4. Between the inlet village 3 and the outlet element 4 extend guide elements 2, each of which is an elongated section in the longitudinal direction of the expander. These guide elements 2 are circularly spaced and generally cylindrical. These guide elements are beveled at their upper and lower ends, the slope of their forehead approximately corresponding to the slope of the truncated conical introduction member 3 and the output member 4. Further, each expander is driven via a transport roll 10 fixed to the device. These transport rolls each run over the truncated cones 3 and 4 from the outside. Of the transport rolls 10, at least the pair of rolls that are connected to the lead-out section 4 are driven to transport the dough along the chain line running path on the expander. Both expanders are each surrounded by a spray nozzle 11 in an annular manner at one or more levels. The spray direction is towards the expander and is indicated by the symbol. First, it is assumed that only the expander BI exists and is applied to, for example, alkali treatment under tension. The expander BI is then immersed in the liquid fluid F in the container 1. Above the liquid margin level, ring-shaped spray nozzles 11' are shown, from which the treatment liquid is sprayed onto the fabric. The direction of conveyance of the fabric is from top to bottom, and therefore not only the weight of the expander BI but also the tensile force of the fabric is applied to the lower conveyance roll 101, increasing the pressing force against it. Therefore, as a countermeasure, as will be explained further below, the frusto-conical outlet 4 is formed as a floating body so that a buoyant force is generated, thereby unloading the strain joint of the pair of transport rolls 10. At the lower end of the expander BI, the fabric is guided in a fan-flat shape beyond the lead-out roll 9, so the fabric spreading knife member 7 is provided here. Now, it is assumed that the expander B2 is applied alone to a cleaning device.

In this case as well, the expander is immersed in the processing liquid F and is similarly configured to float. However, in this case floatability plays a less essential role than in expander BI. This is because, since the fabric conveyance direction is upward, a certain limit of unloading of the pressing force against the lower conveyance roll 10' can be obtained. This expander 2 is
At several levels, it is surrounded by annularly arranged spray nozzles 11 . The lower spray nozzle 11 is then primarily supplied with a liquid pumped from the bath F, for example water in the case of a cleaning device. At a higher level, for example in the spray nozzle 12,
Instead of pump fluid, raw water is sprayed onto the tubular fabric. Further upwards, for the outlet of the expander B2, further nozzle rings 13 to 13' are provided. Instead of liquid, air is ejected from the nozzles of these nozzle rings, and in some cases air is also sucked in. For example, in this case it is assumed that air is first blown onto the fabric through the nozzle 13 and then air is sucked through the nozzle 13'. As is clear from the attached diagram,
The jet nozzle 13 is arranged perpendicular to the direction of fabric conveyance, whereas the direction of action of the suction nozzle 13' is somewhat oblique to the direction of fabric conveyance. It is desirable to configure the nozzle ring in a split type and arrange it so that it can be opened freely. Rather than having to use fluid and air nozzles together, the installation of these nozzles can be carried out individually or in any suitable combination.

This expander can be used not only for liquid processing operations, but also for dry processing operations. Yet another application is shown in expander B2, also in FIG. This is an example of an application for observation/inspection purposes. In this case, the expanded cylindrical fabric is optically scanned. For this purpose, an annular light source 14 is arranged outside the expander,
A photosensitive scanning device 15 is also inserted into the expander itself, for example on the surface of the guide element 2 . The variation in light transmission indicates the location of the defect in the fabric and generates a defect signal which is displayed on a defect display device. Inside the container 1, a Peter roller 16 can be provided between the expanders BI and B2, if necessary.

The structure of the expander will be illustrated and explained with reference to FIGS. 2, 3, and 4.

Each part of the illustrated expander corresponds to each part of the expander BI shown in FIG. 1 in the dough transport direction. Second
The figure is a partial sectional view of the expander structure. At each end of the central carrier 6, which is designed as a tube in the figures, a frusto-conical inlet member 3 and an outlet port 4 are arranged. Furthermore, closing members 5 are arranged at the upper and lower ends of the carrier 6, with which the rotation of the carrier 6, which is configured, for example, as a handle, can be carried out. The carrier 6 also has opposite pitch threads on its upper and lower parts. A screw socket 17 is screwed onto these threads, and the carrier 6
The rotation of the screw sockets causes these screw sockets to move toward or away from each other. These sockets 17
From there, a bearing lever 18 extends obliquely radially outwards to the guide element 2 of the expander. screw socket 1
7 and the bearing lever 18 from the solid line position to the dotted line position, the guide element 2 is also pushed radially outwards to the solid line position, whereby the expander is enlarged and adapted to the diameter of the tubular fabric. As shown in FIG.
Corrugations or shapes are provided on the lower surface of the. This waveform protrudes perpendicularly to the direction of fabric conveyance,
It is formed in a concave manner. As mentioned above, this corrugation ensures a complete treatment of the fabric with the liquid and also ensures a lighter fabric transport. This waveform is also effective for drying processing. Figure 4 shows A in Figure 2.
FIG. 3 is a cross-sectional view taken along line B.

As can be seen from this figure, the guide element 2 forms a segment of the cylindrical casing surface and is supported by a socket 17, which is propelled on the carrier 6, by means of a bar 18 at the dotted position 2'.
is moved radially outward until. To add more,
The guide element 2 exhibits at its upper and lower ends a diagonal bevel which approximately corresponds to the mirror bevel of the truncated cones 3 and 4. FIG. 3 is a side view of FIG. 2.

In this figure, the guide element 2 is shown in a radially pivoted position with its outer end (the end of attachment to the guide element 2) projecting outwards. The transition from the guide element 2 to the outlet 4 is particularly clearly illustrated. As shown in these juxtaposed FIGS. 2 and 3, the lead-out section 4
'It is supported by this. As is clear from Figure 3,
Support. The curve 10 shows a special profile adapted to the curved surface of the derivation 4. In this way, a large bearing surface for the transport roll 10 is obtained. Further regarding the arrangement of the transport rolls 10, although in this example only two parallel rolls each with a roll are shown, three rolls are arranged with their axes at an angle of 60° each, and a right angle It is also possible to arrange two pairs of rolls with their axes crisscrossing each other. Further, in FIG. 3, the running path of the fabric is illustrated by a chain line. As can be seen, after the expansion zone the dough is fed onto a draw-off roll 9 into a fan flat. In order to completely carry out this transition from the broadside area to the fan flat area, expanding knives 7 are provided in the lead-out section 4, and these expanding knives are arranged opposite each other to outwardly expand the fabric. do. The outlet portion 4, shown again in FIG. 5, is formed as a floating body as described above.

The lead-out body 4 is provided with diagonally opposed cutouts 21, and the spreader knife 7 is swingably accommodated in these cutouts. In addition, each one of the sheath springs 19 presses the spreading knife 7 toward the tubular fabric from inside the notch, thereby ensuring flattening of the fabric. If the buoyancy in the liquid bath obtained by the floating structure of the guide body 4 is not sufficient, this buoyancy can be improved by the auxiliary floating body 4' protruding inward. In this case, the floating body 4 and the auxiliary floating body 4' can be formed as one piece or can be assembled as separate parts.
Furthermore, another structural part immersed in the bath, namely the lower end of the guide element 2, can also be constructed as a floating body. Such a floating body is shown at 20 in FIG. Also shown in FIG. 5 is the arrangement of the spray nozzles 11 opposing the troughs of the waveform. The treatment liquid is sprayed through the fabric spread over the corrugations and into the troughs of the corrugations. The present invention is not limited to the structure shown in the above embodiments, but can be modified in many ways.

For example, the guide element 2 absolutely does not have to be constructed entirely between the inlet part 3 and the outlet part 4; if necessary, it can be divided into a mutually separated upper and lower part. In that case, each guide element is provided with its own undercarriage. A link of the spray nozzle can be arranged outside the annular gap between the upper part and the lower part, in which case the spray direction is oriented with respect to said annular gap in the same way as with respect to the corrugation troughs. In some cases, the guide element may be divided into upper and lower parts from the center into an upper cylindrical part and a lower cylindrical part, and the upper cylindrical guide element is positioned above the gap between the lower cylindrical guide elements. The upper and lower cylindrical portions may be disposed with their phases shifted from each other with respect to the center axis of the expander so as to allow the expander to be positioned.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing the arrangement of the expander of the present invention in a processing device, FIG. 2 is a partial longitudinal side view showing the structure of the expander of the present invention, FIG. 3 is a side view of FIG. 2, and FIG. This figure is a plan view of the structure shown in FIG. 2 with the introduction member removed, and FIG. 5 is a detailed view of the lower lead-out portion shown in FIG. 3. 1... Container, 2... Guide element, 3... Introduction member,
4... Derivation member, 4'... Auxiliary floating body, 5... Closing member, 6... Carrier, 7... Spreading knife, 8...
・Introduction roll, 9... Output roll, 10... Conveyance roll, 11... Spray nozzle (pump circulating liquid),
11'...Spray/zzle (processing liquid), 12...Spray nozzle (raw water), 13...Air blowing nozzle, 13'...
- Air suction nozzle, 14... Light source, 15... Scanning device, 16... Heater roll, 17... Screw-in socket, 18... Support lever, 19... Expansion spring, 20...
...Floating body, 21...notch, BI...first expander, B2
...Second expander, F...liquid. FIG. 2 FIG. 3 FIGI FIG. 4 FIG. 5

Claims (1)

Claims: 1. Comprising a central carrier 6 carrying a radially swingable bearing member 18 and segment-shaped guide elements 2 carried by said bearing member for treatment of tubular fabrics with a treatment liquid. . In a cylindrical expander for tubular fabrics held from the outside, at each end of the central carrier 6 there are members 3 tapered in the longitudinal direction of the expander as an inlet and an outlet, respectively.
. An expander for tubular dough, characterized in that the element 2 is elongated, and the conveying roll 10 has a shape adapted to the shape of the tapered bodies 3, 4. 2. Said guide element 2 consists of elongated sections extending in the longitudinal direction of the expander, said sections being arranged at circular intervals and having a generally cylindrical shape, and said tapered bodies 3, 4 are truncated. The expander according to claim 1, characterized in that the expander has a conical head shape. 3. Claims 1 to 2, characterized in that at least a portion of the guide element 2 is formed with a waveform that protrudes or is recessed in a direction perpendicular to the conveying direction of the fabric.
The expander described in any of the paragraphs. 4. An externally held tubular fabric comprising a central carrier carrying a radially swingable bearing element 18 and segment-shaped guide elements carried by said bearing element for treatment of the tubular fabric with a treatment liquid. In this cylindrical expander, tapered members 3 and 4 are arranged at both ends of the central carrier 6 as an inlet and an outlet, respectively, in the longitudinal direction of the expander. A conveying roll 10 for feeding the dough rests, and in the longitudinal direction of the expander, a guiding element 2 extends between the two tapered bodies 3, 4, and said conveying roll 10 . Expander. 5. An externally held tubular fabric comprising a central carrier carrying a radially swingable bearing element 18 and segment-shaped guide elements carried by said bearing element for treatment of the tubular fabric with a treatment liquid. In this cylindrical expander, tapered members 3 and 4 are arranged at both ends of the central carrier 6 as an inlet and an outlet, respectively, in the longitudinal direction of the expander. A conveying roll 10 for feeding the dough rests, and in the longitudinal direction of the expander, a guiding element 2 extends between the two tapered bodies 3, 4, and said conveying roll 10 . A tubular fabric expander characterized in that at least one of the nozzles 13, 13' is arranged in an annular shape. 6. A waveform that protrudes or recesses in a direction perpendicular to the conveyance direction of the fabric is formed on at least a part of the guide element 2, and nozzles 11, 11' are provided for spraying the treatment medium into the troughs of the waveform. , 12 are oriented in the tubular fabric expander according to claim 5. 7. An externally held tubular fabric comprising a central carrier carrying a radially swingable bearing element 18 and segment-shaped guide elements carried by said bearing element for treatment of the tubular fabric with a treatment liquid. In this cylindrical expander, tapered members 3 and 4 are arranged at both ends of the central carrier 6 as an inlet and an outlet, respectively, in the longitudinal direction of the expander. A conveying roll 10 for feeding the dough rests, and in the longitudinal direction of the expander, a guiding element 2 extends between the two tapered bodies 3, 4, and said conveying roll 10 . A light source 14 that emits light toward the fabric at right angles to the direction, a scanning photosensitive device 15 that detects variations in light transmittance on the other side of the tubular fabric, and a defect signal when a variation in light transmittance occurs. An expander for tubular fabrics, characterized in that it has a defect display device coupled to said scanning device for providing a defect display device.